rfyiamcool / grpclb-scheduler

🌈 golang grpc load balance scheduler

grpclb-scheduler

This is a gRPC load balancer for go, supports Random, RoundRobin and smooth weigthed balance algo.

grpclb-schduler's some code refer to github.com/liyue201/grpc-lb

Modify

• format code
• custom logger
• timeout control
• add nginx's smooth weighted round-robin balancing
• add active grpc health check
• fix consul serverEntry interface conv bug
• deincr health interval
• more ...

Test

1. start consul cluster

consul agent -dev

2. start grpc server, registry node info to consul

cd examples/consul/server
go run main_server.go -node node1 -port 11111
go run main_server.go -node node2 -port 22222
go run main_server.go -node node3 -port 33333

3. show available nodes

show on consul dashboard

or

show on consul http api

curl -s "http://127.0.0.1:8500/v1/health/service/test?passing=true"

4. start grpc client, discovery nodes info on consul, invoke !

cd examples/consul/client
go run main_client.go

stdout:

Hello consul, I am node1
active sleep 2s, u can stop a node

Hello consul, I am node2
active sleep 2s, u can stop a node

Hello consul, I am node3
active sleep 2s, u can stop a node

Hello consul, I am node1
active sleep 2s, u can stop a node

Hello consul, I am node2
active sleep 2s, u can stop a node

Hello consul, I am node3
active sleep 2s, u can stop a node

Hello consul, I am node1
active sleep 2s, u can stop a node

Hello consul, I am node2
active sleep 2s, u can stop a node

Hello consul, I am node3
active sleep 2s, u can stop a node

Hello consul, I am node1
active sleep 2s, u can stop a node